Process of desulphurizing molten metal and briquettes used therefor



Patented Dec. 6, 1927.

UNITED STATES PATENT OFFICE.

RICHARD R. WALTER, OF DUSSELDORF, GERMANY.

PROCESS OF DESULPHURIZING MOLTEN METAL AND BRIQUETTES USED THEREFOR.

Ho Drawing. Application filed March 16, 1922, Serial F0. 544,332, and in Germany April 8, 1921.

and I have found that when thus applying the said media to the metal the media are thrown moror less into the, surrounding. air by the gases generated from the liquid 7 metal and the whirls of air produced on the surface of the metal, which results in a loss of desulphurizing media and injury to the attendants. The object of the improvements is to obviate this Objectionable feature of' the rocess now in use, and with this object in view I form the said pulverulent or" crystalline matter into pieces ofgranular form, andthrowithe said pieces on the-surface of the metal. thus using the desulphurizing media they 5 melt on the surface of the metal without any loss. Furthermore the media melt with greater speed by reason of their" more 00- herent state and their increased heat conducting capacity..

In the practiceof my invention I use any known or preferred methods for thus forming the desulphurizing media into pieces. One method consists in melting the'media and casting the same in suitable moulds.

Another method consists in making blocks of suitable size by means of suitable binding media such for example asghydraulic cement or lime, and 'a third method consists in forming the media into bricks by means 40 of a suitable binding medium such as tar and under high pressure.

' I claim: 1

1. The process of desulphurizing 'ni olten pound. I have found that when metal, which consists in introducing an alkali metal compound as a cast piece of pre- 46 determined size in a quantity of molten metal.

X 2. The process of desulphurizing molten I metal, which consists in associating with an industrially conventional quantity of molten metal a single premelted and solidified portion ofan alkali metalcompound.

3. The process of desulphurizing molten metal, which consists in introducing in a quantity. of molten metal a mixture of an alkali metal compound-and an alkaline earth metal compound as a cast piece of predetermined size.

4. The process of desulphurizing molten metal, which consists. in associating with 60 an industrially conventional quantity of molten metal a single premelted and solidi-. fied lump-mixture of an alkali metal compound and of an alkaline earth metal com- 65 5. The process of desulphurizingv molten metal, which consists in associating with a given quantity of the molten metal, a unitary premelted mass of a dry desulphurizing compound of alkali character and of predetermined size in proportion to the quantity of molten metal.

6. The-herein described process of desuL phurizing-molten metal. which consists in associating with the molten metal, a desulphurizing media in the form of a piece sufficiently heavy to prevent its being thrown up from the surface of the molten metal by the gases generatedat the surface thereof and sufiiciently dry for prevention of an explosion.

7 2 'As a new articlev of manufacture a desulphurizing briquette composed of a completely fused compound of alkali character.

In' testimony whereof I aflix my signature.

RICHARD WALTER. 

